Drill-pulling jack



Feb. 9 1926. 1,572,048

E. F. SPENCER ET AL DRILL PULLING JACK Filed April 1925 2 Sheets-Sheet 1 Feb. 9 1926.

E. F. SPENCER ET AL DRILL PULLING JACK 2 Sheets-Sheet 2 Filed April 2 1925 Patented Feb. 9, 1926..

barren STATES 1,572,048 PATENT OFFICE;

EAR-NEST r. SPENCER Ann cnAnLnY o. srnn'cnn, on commence, OKLAHOMA.

DRIL -PULLING ACK-Q f Application filed April 28, 1925. Serial N'o. 26559.

To all whom it may concern: 1 7

Be it known that we, EARNnsr F, SriiN-onn and njannav O. Elrnnonn, citizens of the United States, residing at Commerce, in the county of Ottawa and State'of Oklahoma, have invented certain new and useful Improvements in Drill-Pulling Jacks; and we do hereby declare the following to be a full, clear, andexact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to miners tools and particularly to devices to remove drills from boi'ings when they become stuck or held fast by the drillings or cuttings in the drill hole, and has for its object the provision of a device adapted to be applied readily to the drill stem and that will effectually pull the stem out of the hole.

The invention will be described in detail hereinafter and will be found illustrated in the accompanying drawings, in which l igure 1 is a plan view of the drill pulling jack showing it applied to the drill in position in a drilling,

.l igure 2 a longitudinal sectional View on a plan indicated by the line 2-2 of Figure 1, I

Figure 3 a cross sectional view on a plan indicated by the line 3-3 of Figure 1,

liigure 4: a fraginental sectional view on the plane indicated by the line 1- 1 of Figure 2,

Figure 5 a cross section on a plane indi cated by the line 5-5 of Figure 1,

l igure 6 a view in perspective of the jack lug or block, and

Figure 7 an end view of the drill stem.

In the drawings, similar reference char acters will be used to designate correspond ing parts throughout the severalviews.

The device hereinafter described and shown in the drawings is applicable to drill stems such as shown at A having laterally projecting lugs B. The jack comprises a sleeve 1 that is adapted to seat against the face of the wall C in which a boring'D has been made, said sleeve 1 being mounted to surround the stem of thedrill A. The head of the sleeve 1- indicated at 2 has thickened walls as shown and these walls are formed with screw-threads 3 on their interior face.

4t indicates a'tubular member that is screwthroaded as shown at 5 to engage the threads a, and its outer end is formed with an enlarged head 6 having lateral openings 7 to receive a crow bar or other tool to rotate the tubular member 4 when the device is operated as a jack for the purpose of withdrawing-the drill from the opening D.

'l heend face of head 6 is provided with a ball raceway 8, and 9 indicates a sleeve inserted on the end of head 6 and provided with an inwardly extending flange 10 to hold the ring 11 in place, said ring 11 being provided with a ball raceway 12,13 indicating the anti-friction balls engaging the raceways S and 12.

A jack lug or block 1 1 is provided with an opening 15 to receive the stem of the drill A, and 16 indicates grooves" in the walls of opening 15 that will slidably engage the lugs B to permit the lug or block 1 1 to be inserted on the drill stem. The lug or block 14 is also provided with recesses 17 communicating with the opening 15 therein at one end thereof and forming shoulders 18 on which the lugs B seat when the jack is in operation to pull the drill out of the boring Lug or block 14 is also provided with recesses 19 to receive a crow bar or othertool to rotate the drill should it be found neces-- sary to do so during the pulling operation to more readily remove it from the boring.

20 indicates a guide ring seated between lug or block 14 and ring 11, said guide ring being formed with an elongated opening 21 having curved portions 22 intermediate of its ends, said opening 21 and curved portions 22 being adapted top ermit insertion of the guide ring 20 on the drill stem and over the lugs 13. The guide: ring 20 when the device is in operative position, as shown in Figures 1, 2, aud t seat on ring 11, and the bearings 13'permit rotation of the tubular member 4 and head 6 thereon independently of the movement of the drill stem and lug or block 14, guide ring ,20, and bearing ring 11. i

In operation it will be understood that different parts of the device heretofore described are inserted over the drill stein that may have stuck in the boring, the parts 1 and 4 being assembled when placed in position. The guide 20 is then placed on the drill stem and afterwards the jack lug or block 1 1 is mounted on the stem. By backing up on the threaded member 1 the drill stem will be withdrawn from the boring. the sleeve 1 engaging the face of the wall surrounding the boring and the wall face sustaining the thrust of the device'in the unscrewing operation What is claimed is 1. In a drill pulling jack in combination with a drill stem and oppositely disposed lugs on said drill stem, a jack lug having an opening to receive the drill stem and grooves in the walls of said openings to slid-ably engage said lugs, and the walls of the openings also formed with recesses adapted to receive said lugs. v

2. A drill pulling jack comprising in combinationwith a drill stem havinglugs thereon, a tubular sleeve adapted toenclose the drill stem, an 'interi orl-y threadedhead on said sleeve, a threaded tubular member engaging said interiorly threaded head, a head on said tubular member having lateral openings, a sleeve secured to said head and having an inwardly extending flange, ring 1'0- tatablyinounted within said last mentioned sleeve, anti-friction bearings between said head and ring, a jack lug engaging the drill stem and the lugs thereon, and a guide ring engaging the first mentioned ring and said jack lug. a

In testimonywhereof we aflix our signa tures. J g

EARNEST F. SPENCER.

CHARLEY O. SPENCER. 

